[slowbird]

Looks like a ProMod head to me so Lil Jack should run 5.9s at 250 or that head is crap.

[cptinjak]

Originally Posted by RA462

I got to see the heads at the show myself. Very cool Pontiac porn for sure. I'm not really familiar with billet heads at all but how do they get enough water passages to cool them?

Glad you stopped by! They are gun drilled and cross drilled. We hit 3 sides of the exhaust port, pull water past the seats and spark plug area, and any other critical areas specific to the head design. I know it seems like a small amount of water compared to conventional "jackets" but we have lots of heads out there running setups similar to this, so we are very confident in this design. We actually have plans to do a set of 5.300" billets for a twin turbo drag week car, and this water setup will be used. We're confident.

Jack

[Stan Weiss]

Originally Posted by slowbird

Looks like a ProMod head to me so Lil Jack should run 5.9s at 250 or that head is crap.

He does not have the large bore spacing or intake valve size needed to help make the N/A HP of a Pro Mod plus he has more weight. But if he has unlimited traction and sprays 1000 nitrous HP I have him going

60 Foot ET = 1.0110
330 Foot ET = 2.6861
1/8 Mile ET = 4.0760
1/8 Mile MPH = 177.2793
1000 Foot ET = 5.2735
1/4 Mile ET = 6.2896
1/4 Mile MPH = 222.3594

Stan

[R 70 Judge]

Originally Posted by LiL Jack

So by looking at a few pictures a few here can tell what kind of power it will make and what it should run?

Crazy.

Not the first time this has happened. Just sayin

[RA462]

Originally Posted by cptinjak

Glad you stopped by! They are gun drilled and cross drilled. We hit 3 sides of the exhaust port, pull water past the seats and spark plug area, and any other critical areas specific to the head design. I know it seems like a small amount of water compared to conventional "jackets" but we have lots of heads out there running setups similar to this, so we are very confident in this design. We actually have plans to do a set of 5.300" billets for a twin turbo drag week car, and this water setup will be used. We're confident.

Jack

Thanks for the reply. I design plastic injection molds and we cool tooling the same way. I was just trying to envision the circuit in my own head and yep that will work. You have my dream job. Nice work!

Todd

[Stan Weiss]

Originally Posted by LiL Jack

So by looking at a few pictures a few here can tell what kind of power it will make and what it should run?

Crazy.

It is amazing what people have been able to with computers for a long tome now. I bet those toilets that you install were computer designed.

Stan

[LiL Jack]

Originally Posted by GTOGEORGE

Water?


GTO George

Yes.

[LiL Jack]

Originally Posted by Stan Weiss

Jeff,
And what is wrong with that.

If I turn the nitrous off and just run it N/A.

60 Foot ET = 1.1785
330 Foot ET = 3.2024
1/8 Mile ET = 4.9139
1/8 Mile MPH = 143.4630
1000 Foot ET = 6.4062
1/4 Mile ET = 7.6682
1/4 Mile MPH = 179.4297

Again DA = 0. Can Lil Jack's car run that 60 foot time?

Stan

PS - So I have the 500 rear wheel nitrous HP good for almost .7 seconds and over 20 MPH.

PSS - Edit - Just some you know what I am working with I added a graph of the HP curve.

If it ran that on the spray the first year, I would be very happy!

This motor in NA form would not make anywhere near 1600 HP

[Stan Weiss]

Originally Posted by LiL Jack

If it ran that on the spray the first year, I would be very happy!

This motor in NA form would not make anywhere near 1600 HP

Lil Jack,

If you look at the graph I posted, I have it making 1315 N/A HP and that is just a WAG. As I said those times are with DA = 0 and how many time have you run at DA = 0? What is the best 60 foot your car has ever run? I adjusted the traction so you run 1.22 60 foot like Kinsler did last year.

60 Foot ET = 1.2209
330 Foot ET = 3.2574
1/8 Mile ET = 4.9717
1/8 Mile MPH = 143.3027
1000 Foot ET = 6.4653
1/4 Mile ET = 7.7281
1/4 Mile MPH = 179.3339

I can then adjust for a DA of of around 2700 feet

60 Foot ET = 1.2250
330 Foot ET = 3.3040
1/8 Mile ET = 5.0577
1/8 Mile MPH = 140.1836
1000 Foot ET = 6.5846
1/4 Mile ET = 7.8777
1/4 Mile MPH = 175.1525

And last but not less almost everyone things my simulations are to optimistic.

Stan

[ponjohn]

There is a lot of talk about how this head is designed for NOS.

Would this design also favor a boosted application?
OR is that a completely different set of parameters?

[scott foxwell]

Cool stuff. Wonder how many really know what it takes to get a head to this stage. Kudos...that's a lot of work. Wish I had a chance to see it at PRI. Too much ground to cover and not enough time. Good luck with the project.

[ventura7211]

Originally Posted by ponjohn

There is a lot of talk about how this head is designed for NOS.

Would this design also favor a boosted application?
OR is that a completely different set of parameters?

Sure it could be made to work. I can't tell how these heads were softened, some are smooth transitions that can only be noticed with a straight edge, others I've seen look like stair steps in the chamber, same type heads from different shops.

I know of a 481x that is being converted to nitrous use, they are being told it won't work, guess we will see next season.

Originally Posted by BruceWilkie

The SCJ, P51 and Boss9 Ford heads can make alot of power... each more than the other respectively but they arent in same league as the pro-stock heads are they? It even reflects in the cost. Ford gang choses what meets there needs and run it. Not very much politics or back-stabbin over cylinder heads like seen here for sure.

Originally Posted by BruceWilkie

Just like a ported SCJ or P51 Ford or Boss9 is not in same league as the pro-stock Ford heads. CV1 was never intended to be.

What exactly are you calling a ford "pro-stock" head? The E460 junk or the hemi/DRCE knock off junk that only a couple people have attempted to run?

I know of a boss9 headed engine using an ancient AR block like I have that has been faster than any of the pro stock junk in an old chassis with an old f3. The heads and block are '80s tech, the procharger early '00s, runs in the bottom 4s 1/8th mile.

C460s have valve train problems and need the chambers softened for nitrous use, the "replacement" head has a tendency for the seats to fall out of them. A460s have been just as fast as any C460 headed motor.

One of the best choices available would be the current Blue Thunder Thors, if you have the 10k for pair.

[cfmcnc]

Originally Posted by scott foxwell

Cool stuff. Wonder how many really know what it takes to get a head to this stage. Kudos...that's a lot of work. Wish I had a chance to see it at PRI. Too much ground to cover and not enough time. Good luck with the project.

Scott,Welcome to PY.Bill C.

[cptinjak]

Originally Posted by ventura7211

One of the best choices available would be the current Blue Thunder Thors, if you have the 10k for pair.

We have a new 4.900" billet that we brought to PRI also. Most people were too busy looking at the Pontiac though... haha

Jack

[David Holmberg]

Originally Posted by scott foxwell

Cool stuff. Wonder how many really know what it takes to get a head to this stage. Kudos...that's a lot of work. Wish I had a chance to see it at PRI. Too much ground to cover and not enough time. Good luck with the project.

Welcome to PY Mr. Foxwell

[LiL Jack]

I made a mistake in an earlier post. This head does not have the 4 extra head bolts.
It is possible to do this with the billet head but did not get it on my set.

And there was another set sold for an NA application at PRI also.

Tony Biscoff saw the head at PRI and he liked it a lot also.

Visner said the Pontiac head was a big hit at PRI. And could tell the Pontiac community was a tight group and a lot of people new each other.

Pontiac Power!

[Stan Weiss]

Originally Posted by scott foxwell

Cool stuff. Wonder how many really know what it takes to get a head to this stage. Kudos...that's a lot of work. Wish I had a chance to see it at PRI. Too much ground to cover and not enough time. Good luck with the project.

Hey Scott,
Welcome.

Stan

[scott foxwell]

Originally Posted by cfmcnc

Scott,Welcome to PY.Bill C.

Hey Bill. Thanks for the heads up on this. Not very "up" on Pontiac stuff but it's sure good to see the industry still supporting these kinds of new products.

Thanks Stan, Thanks David.

[ventura7211]

Originally Posted by cptinjak

We have a new 4.900" billet that we brought to PRI also. Most people were too busy looking at the Pontiac though... haha

Jack

LOL. Are they the same ones listed on the site? What would the closest cast head be to them? A, C, Thor?

[mike leech]

Originally Posted by Stan Weiss

It is amazing what people have been able to with computers for a long tome now. I bet those toilets that you install were computer designed.

Stan

can they calculate how much crap you can throw in and they still work?